Muffler.



No. 7o|,|5|. Pfenfeu may 27, |902.

c. E. cHmsTMAN.

MUFFLER.

(Application med Jan. 2o, 1902.1

(No Model.) 2 Sheets-Sheet 2.

ma Nonms Farms co. pHoro-umm wAsxlncroMo. c.

PATENT OFFICE.

CHARLES E. CHRISTMAN, OF SAN JOSE, CALIFORNIA, ASSIGNOR TO OHRISTMAN MOTOR CARRIAGE CO., OF SAN JOSE, A CORPORATION OF YVEST VIRGINIA.

CALIFORNIA,

MUF'FLER.

SPECIFICATION forming part ot' Letters '.atent No. '701,1 51, dated May 27, 1902.

Application filed January 20, 1902. Serial No. 90,488. (No model.)

To @ZZ whom it may concern:

Beitknown that l, CHARLES E. CHEIsrMAN, a citizen of the United States, residing at San Jose, in the county of Santar Clara and State of California, have invented certain new and useful Improvements in Mufflers; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters of reference marked thereon.

The present invention has relation to that class ot devices usually termed mui'llers and which are employed for deadening the noise produced by steam, vapor, or gas discharged under pressure into the atmosphere, and also the present construction of inui'iier is designed more particularly as an adjunct or attachment to an automobile and applied in connection with the exhaust-pipe thereof. It is equally applicable to any engine or other contrivance in which steam, Vapor, or gas is used and in which the noise attending the escape thereof is requiredto be deadened to render it less objectionable.

The invention consists in a muffler constructed substantially as shown in the drawings and hereinafter described.

Figure l of the drawings is a longitudinal section of a mu'fiier constructed in accordance with my invention; Fig. 2, a similar View taken at right angles to that of Fig. l; Fig. 3, an end view thereof; Fig. 4, a view showing the discharge end of the multler opposite to that of Fig. 3; Fig. 5, a cross-section taken on lines 5 5 of Figs. l and 2 and lookingin the direction of the arrow and showing the relative position of the conductingn pipes and the discharge-pipes; Fig. 6, a crosssection taken on line 6 6 of Figs. l and 2 and looking in the direction of the arrow and showing the discharge #pipes through which the steam, vapor, or gas is discharged through the end of the mutller into the atmosphere.

In the accompanying drawings, A represents an outer cylinder, and B the inner cylinder, of. the muiiier, which may be of any suitable diameter and length and connected together in any desirable manner found best adapted to the purpose.

The heads a h of the inner cylinderB have openings, to either one of which may be coupled the usual exhaust pipe, the opposite opening being closed by a suitable screwu plug c.

A plurality of conducting-pipes C are located in the space between the walls of the outer cylinder A and inner cylinder B and are somewhat shorter than the length of the cylinders, so that the escape ends of the pipes will discharge the steam, vapor, or gas Within the space between the walls of the two cylinders near the ends thereof. The conductingpipes C, which extend longitudinally and parallel with the two cylinders A B, communi cate with the interior of the inner cylinder B, near one end thereof, through the medium of gooseneck couplings d or by any other means found most convenient to form a communication between the interior of the inner cylinder and the conducting-pipes, this means of communication (shown in the drawings) between the cylinder and pipes not being essential to the successful operation of the invention so long as means are provided for securing communication between the cylinder and pipes. A plurality of discharge-pipes D are also located in the space between the outer and inner cylinders A B, these pipes also extending longitudinally and parallel with the cylinders and somewhat shorter than the cylinders, as shown in Fig. 2 ofthe drawings. The discharge-pipes D, through which the steam, vapor, or gas is discharged into the atmosphere, extends through the head e of the outer cylinder A, and the pipes C are somewhat shorter than the cylinders. The open ends of the discharge-pipes, which are located in the space between the walls of the two cylinders, are at the opposite ends of the cylinders to that of the discharge ends of the pipes C, the relative location of the pipes and their arrangement with relation to each other bein g clearly shown in Figs. l and 2 of the drawings. The exhaust steam, vapor, or gas will pass from the exhaust-pipe into the interior of the cylinder B, as indicated by the arrows, and circulate therein and pass back to the end of the cylinder, where it finds an outlet through the goosenecks d, and into the con IOO ducting-pipes C. The steam, Vapor, or gas after entering the conducting-pipes C will pass along,` the same and out through the open ends thereof into the space between the cylinders A B and along in an opposite direction to the open ends of the discharge-pipes D and thence through said pipes out at the opposite ends thereof and into the atmosphere. The device is sim ple, durable, and practical, there being,r absolutely no noise to the exhaust when discharged into the muiiier, the back pressure being brought to a minimum.

The discharge and conducting pipes being all parallel with the cylinders and arranged as hereinbefore described renders the muiiier perfect in action and overcomes the defects hereinbefore experienced.

Having now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. A muffler comprising an outer cylinder and an inner cylinder, means for connecting the exhaust With the inner cylinder, and a plurality of condensing-pipes and a plurality of discharge-pipes, the former communicating with the interior of the inn er cylinder and the latter communicating with the atmosphere, and both sets of pipes located in the space between the inner and the outer cylinders, substantially as and for the purpose set forth.

2. A mulller comprising an outer cylinder and an inner cylinder, said inner cylinder provided with means for connecting,r with the exhaust-pipe, a plurality of conducting-pipes and a plurality of discharge-pipes located within the space between the two cylinders, the conducting-pipes communicating,` at one end with tlie'interior of the inner cylinder and at their opposite ends communicating' with the space between the two cylinders, and the discharge-pipes communicating at their opposite ends with the space between the two cylinders and with the atmosphere respectively, whereby the steam, vapor or gas is discharged into the same, substantially as and for the purpose specied.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

CHARLES E. CHRISTB'IAN.

Witnesses:

CHAs. II. Heee,

`Srno. II. Fnos'rnn. 

